I'm repairing a laptop but i have a problem

#1

Hello! I’m repairing a laptop but i’m having a problem. When the laptop loads windows it shuts down… I’ve done experiments with MemTest but the ram seems to be ok. Loading linux doesn’t give problems too… But when windows starts up the laptop goes off. There are not problems with cooling too :\

#2

Updates keep install?

#3

you meter the CPU temp?
i had this problem too, but when i replaced thermal grease on my processor problem disappeared